Hello torikoos.Thanks for your reply. The N gauge engine 5490 is a B30 with AAR-B truck assembly.I have an exploded service sheet but still cannot work out how to get to the axle. My wife took some photos(i'm computer hopeless!!) but could not send through the forum. DJ

The forum doesn't allow to upload pictures as we don't have server space big enough. However you can embed pictures. For that you upload pictures to an image hosting site such as Flickr (this is often free to sign up for) and then use links to 'embed' the picture in your post.

Because it is not my account I guess I don't have the correct access priviledges.
Anyway if you use the link and go to one of the pictures and look at it full screen, in the bottom right you have the option to download the photo. Next to it you find a little arrow, this is for 'sharing'.

For you this arrow should be white, not grey. If it's grey, then it's probably your privacy/sharing settings for flickr.
In any case, clicking on the arrow should then give you a little dialog, select bbcode from the little menu and the complete text (code) should be highlighted in the center below. Copy that, and paste it in your message here on the forum, just as you've done with the link.
It should then embed your picture in the post.

In anycase thanks for the link. Can you also make a picture of the bottom of the truck? just to see if we can discover any clips (I'm not an N scale modeler myself, but there may be several here on our forum who are and know exactly what to do).

Hello(better late than never) Yesterday I typed 'atlas n gauge GP 38 bogie repair' and hey presto it came up with 'images for bogie repair' and after scrolling there was a picture of what I wanted. magic!!!! A friend has the bogies at present so will try repair when it is returned. Anyeay thanks for your help. Beat wishes, GDJ